kǔ苦bitter; hardship, sufferingHSK 4 · Frequency 4.4Meaningsbitter;苦; hardship; sufferRelated words苦难苦恼苦力苦心苦练苦笑苦尽甘来苦因苦死苦逼苦待苦根Example sentences他苦笑起来。他工作很辛苦。他痛苦之至。